I guess that depends what you mean. Will they add the content that they currently hint at in game over the next year? yes most likely we'll see some form of kingdom management, party and companion management on a better level, diplomacy of some sort, perks, some form of progression and a working economy.
But will they add stuff beyond what they say is already in the game just not complete? Uhhhh if I were to guess probably not within EA, most likely we'll see some form of DLC, or possibly if we're lucky some big patches post-ea that add a bit more content. But if I were to hazard a guess I'd say what you see in game right now is what you get except they'll just be adding the actual content to the framework they have.
But I could be completely wrong. They could suddenly do a 180 and start dropping loads of content on us like a dump truck over the next few months who knows, I don't develop games. lol.